Optical properties of mesogen-coated gold nanoparticles

In this work, the physical and optical properties of gold nanoparticles functionalized with laterally grafted nematic ligands were studied. In particular, the influence of the nanoparticle size on the mesomorphic behavior and optical properties of the composite was investigated. To obtain an in-plane alignment of the mesogens, thin oriented films were prepared by shearing and characterized by polarized absorption spectroscopy. While the sub-2nm nanoparticle thin film only showed birefringence due to a strong damping of the plasmon resonance, larger NPs exhibit a strong dichroism with a shift of the NP plasmon resonance by about 50 nm. These results demonstrate the possibility to obtain a bulk NP metamaterial with tunable plasmonic properties by chemical engineering of the NP ligands.


Published in:
Quantum Dots And Nanostructures: Synthesis, Characterization, And Modeling Ix, 8271, -
Presented at:
Conference on Quantum Dots and Nanostructures - Synthesis, Characterization, and Modeling IX, San Francisco, CA, Jan 24-25, 2012
Year:
2012
Publisher:
Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa
ISBN:
978-0-8194-8914-2
Keywords:
Laboratories:




 Record created 2012-05-11, last modified 2018-01-28


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